Toronto police have posted video of missing 17-year-old Eva Ho on YouTube to help their investigation, CTV Toronto reports. Investigative leads suggest she might be in Hong Kong, so the social Web is a logical tool to get the word out internationally. It’s a first for the Toronto police but a growing trend in law enforcement, CTV adds. In another case last December, “Hamilton police posted surveillance video of two men attending a hip-hop concert in the city. They were hoping to gain clues in the investigation of a stabbing death. The short video was viewed online more than 30,000 times.” Within about two weeks, a suspect turned himself in.